--  @testpoint:opengauss关键字return(非保留)，作为函数名

--关键字不带引号-成功
drop function if exists return;
create function return(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function return;
--关键字带双引号-成功
drop function if exists "return";
create function "return"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "return";
--关键字带单引号-合理报错
drop function if exists 'return';
create function 'return'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `return`;
create function `return`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/